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git.ipfire.org Git - thirdparty/openssl.git/blob - crypto/dsa/dsa_lib.c
1 /* crypto/dsa/dsa_lib.c */
2 /* Copyright (C) 1995-1998 Eric Young (eay@cryptsoft.com)
5 * This package is an SSL implementation written
6 * by Eric Young (eay@cryptsoft.com).
7 * The implementation was written so as to conform with Netscapes SSL.
9 * This library is free for commercial and non-commercial use as long as
10 * the following conditions are aheared to. The following conditions
11 * apply to all code found in this distribution, be it the RC4, RSA,
12 * lhash, DES, etc., code; not just the SSL code. The SSL documentation
13 * included with this distribution is covered by the same copyright terms
14 * except that the holder is Tim Hudson (tjh@cryptsoft.com).
16 * Copyright remains Eric Young's, and as such any Copyright notices in
17 * the code are not to be removed.
18 * If this package is used in a product, Eric Young should be given attribution
19 * as the author of the parts of the library used.
20 * This can be in the form of a textual message at program startup or
21 * in documentation (online or textual) provided with the package.
23 * Redistribution and use in source and binary forms, with or without
24 * modification, are permitted provided that the following conditions
26 * 1. Redistributions of source code must retain the copyright
27 * notice, this list of conditions and the following disclaimer.
28 * 2. Redistributions in binary form must reproduce the above copyright
29 * notice, this list of conditions and the following disclaimer in the
30 * documentation and/or other materials provided with the distribution.
31 * 3. All advertising materials mentioning features or use of this software
32 * must display the following acknowledgement:
33 * "This product includes cryptographic software written by
34 * Eric Young (eay@cryptsoft.com)"
35 * The word 'cryptographic' can be left out if the rouines from the library
36 * being used are not cryptographic related :-).
37 * 4. If you include any Windows specific code (or a derivative thereof) from
38 * the apps directory (application code) you must include an acknowledgement:
39 * "This product includes software written by Tim Hudson (tjh@cryptsoft.com)"
41 * THIS SOFTWARE IS PROVIDED BY ERIC YOUNG ``AS IS'' AND
42 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
43 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
44 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
45 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
46 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
47 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
48 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
49 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
50 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
53 * The licence and distribution terms for any publically available version or
54 * derivative of this code cannot be changed. i.e. this code cannot simply be
55 * copied and put under another distribution licence
56 * [including the GNU Public Licence.]
59 /* Original version from Steven Schoch <schoch@sheba.arc.nasa.gov> */
67 char *DSA_version
="DSA part of OpenSSL 0.9.1c 23-Dec-1998";
73 ret
=(DSA
*)Malloc(sizeof(DSA
));
76 DSAerr(DSA_F_DSA_NEW
,ERR_R_MALLOC_FAILURE
);
85 ret
->flags
=DSA_FLAG_CACHE_MONT_P
;
92 ret
->method_mont_p
=NULL
;
103 if (r
== NULL
) return;
105 i
=CRYPTO_add(&r
->references
,-1,CRYPTO_LOCK_DSA
);
113 fprintf(stderr
,"DSA_free, bad reference count\n");
118 if (r
->p
!= NULL
) BN_clear_free(r
->p
);
119 if (r
->q
!= NULL
) BN_clear_free(r
->q
);
120 if (r
->g
!= NULL
) BN_clear_free(r
->g
);
121 if (r
->pub_key
!= NULL
) BN_clear_free(r
->pub_key
);
122 if (r
->priv_key
!= NULL
) BN_clear_free(r
->priv_key
);
123 if (r
->kinv
!= NULL
) BN_clear_free(r
->kinv
);
124 if (r
->r
!= NULL
) BN_clear_free(r
->r
);
125 if (r
->method_mont_p
!= NULL
)
126 BN_MONT_CTX_free((BN_MONT_CTX
*)r
->method_mont_p
);
135 unsigned char buf
[4];
140 bs
.type
=V_ASN1_INTEGER
;
141 /* If the top bit is set the asn1 encoding is 1 larger. */
144 i
=i2d_ASN1_INTEGER(&bs
,NULL
);
146 ret
=ASN1_object_size(1,i
,V_ASN1_SEQUENCE
);